US5423636A - Cement soil apparatus of underground borer - Google Patents

Cement soil apparatus of underground borer Download PDF

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Publication number
US5423636A
US5423636A US08/083,172 US8317293A US5423636A US 5423636 A US5423636 A US 5423636A US 8317293 A US8317293 A US 8317293A US 5423636 A US5423636 A US 5423636A
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Prior art keywords
screw shaft
down hammer
supply conduits
cement
disposed
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Expired - Fee Related
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US08/083,172
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Jeon J. Mo
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Kencho Kobe Co Ltd
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Kencho Kobe Co Ltd
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Assigned to KENCHO KOBE CO., LTD. reassignment KENCHO KOBE CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MO, JEON JIN
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B3/00—Rotary drilling
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds

Definitions

  • the present invention relates to a cement soil apparatus of underground borer and a method of forming an underground hole.
  • An object of the invention is to provide a cement soil apparatus of underground borer capable of solving the above conventional various problems.
  • the present inventor has developed an improved apparatus for smoothly perfoming boring operation in the aforementioned operation and has already filed an application entitled "Underground Borer" (Japanese Utility Model Application No. Hei 3-109630). Essentially, the aforementioned object can be accomplished by laying a cement soil apparatus in the underground borer according to the anterior application.
  • a screw shaft and a rotary machine for rotating it are disposed on a guide stilt of a vehicle body, a down hammer formed with a screw blade is connected to a lower end of the screw shaft, supply conduits for cement milk or the like are formed in the screw shaft and the down hammer, respectively, such that the supply conduits in the screw shaft are in communication with those in the down hammer, and valves openable by pressure are disposed in lower end portions of the supply conduits.
  • a hexagonal projection formed at an upper end portion of the down hammer is fitted in a hexagonal hole formed in a lower end portion of the screw shaft and the hexagonal projection is fixedly coupled to the screw shaft by a pin
  • supply conduits for cement milk or the like are formed in the screw shaft and the down hammer, respectively, such that the supply conduits in the screw shaft are in communication with those in the down hammer, and valves openable by pressure are disposed in lower end portions of the supply conduits, whereby cement milk or the like can be supplied from the outside to the inside of a bored hole.
  • boring operation by the down hammer is carried out, and after completion of the boring operation, the down hammer is pulled up while cement milk or the like being supplied to the wall surface of a bored hole to plaster the inner surface of the bored hole with cement milk or the like.
  • cement milk (this is not limitative and, for example, bentonite may be used) can be grouted to prevent collapse of an original form of the bored hole and keep it as it is and besides, the cement milk can be grouted into part of the original ground below the bored hole to increase strength of the ground. Accordingly, after insersion of a pile, frictional force at the periphery of the pile can also be increased to minimize settlement of the pile. At the same time, operation can be very simplified as compared to the conventional operation and therefore a remedial function of drastically reducing the cost of operation can be fulfilled.
  • FIG. 1 is a side view showing the overall construction of the invention.
  • FIG. 2 is an enlarged, longitudinal sectional view of a hammer extracted from A portion of FIG. 1.
  • FIG. 3 is a cross-sectional view taken on the line B--B of FIG. 2.
  • FIG. 4 is a cross-sectional view taken on the line C--C of FIG. 2.
  • FIG. 5 is a diagram showing an example of a state of cement grouting by the apparatus of the invention.
  • a screw shaft 3 and a rotary machine 4 for rotating it are disposed along a guide stilt 2 standing upright in front of a vehicle body 1, and a down hammer 6 formed with a screw blade 5 is connected to a lower end of the screw shaft 3.
  • a hexagonal hole 7 is formed in a lower end portion of the screw shaft 3
  • a hexagonal projection 8 is formed at an upper end portion of the down hammer 6, the hexagonal projection 8 is fitted in the hexagonal hole 7, and the hexagonal projection 8 is fixedly coupled to the screw shaft by means of a pin 9.
  • a pressurized air supply conduit 3' is bored in the center and cement milk supply conduits 10 and 10' are bored on both sides of the conduit 3' and in the down hammer 6, conduits 11 and 11' in communication with the supply conduits 10 and 10', respectively, are also bored so that cement milk may be dischaged through valves 12 and 12' disposed in lower end portions of the conduits.
  • a channel extending from a cement mixer 13 connects to the cement milk supply conduits 10 and 10' through the rotary machine, and the valves 12 and 12' disposed at the lower end portion of the down hammer 6 are allowed to open only when supply pressure of the cement milk prevails in the conduits 11 and 11'.
  • reference numeral 14 designates a generator, 15 an air compressor and 16 a bored hole.
  • the hole 16 is bored by operating the down hammer 6. Slime generated during this operation can be removed readily by means of the screw blade 5 and screw shaft 3 and the hole 16 can be dug to a deeper depth in accordance with the same operation as that of the apparatus described in the aforementioned anterior application.
  • the down hammer 6 is driven and the cement mixer 13 is operated to supply cement milk to the conduits 10 and 10' and 11 and 11'.
  • the valves 12 and 12' are opened by supply pressure of the cement milk supplied and the cement milk is grouted in the inner columnar surface of the hole 16.
  • the down hammer in rotation plasters the cement milk to form a cement column and wall and consequently an original form of the hole can be conserved as it is, thereby ensuring that the pile can be inserted readily, frictional force at the periphery of the inserted pile can also be increased by the cement milk inside the hole 16, the strenght of the stratum can also be increased and eventually settlement of the pile can be stopped.
  • pile driving operation can be simplified greatly as compared to that in the conventional working method and the cost of foundation work can be reduced drastically.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paleontology (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

There is provided a cement soil apparatus of underground borer capable of improving the efficiency of operation such as pile driving in civil engineering foundation work. A screw shaft 3 and a rotary machine 4 for rotating it are disposed on a guide stilt 2 of a vehicle body 1, a down hammer 6 formed with a screw blade 5 is connected to a lower end of the screw shaft, supply conduits 10, 10' and 11, 11' for cement milk or the like are formed in the screw shaft and the down hammer, respectively, such that the supply conduits in the screw shaft are in communication with those in the down hammer, and valves 12, 12' openable by pressure are disposed in lower end portions of the supply conduits, whereby cement or the like can be supplied from the outside to the inside of a bored hole. When boring operation ends and the down hammer is pulled up, cement milk is grouted. Through this, an original form will not be collapsed so as to be kept as it is, and the cement milk is also grouted to part of the original ground below the bored hole to increase the strength of stratum.

Description

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cement soil apparatus of underground borer and a method of forming an underground hole.
2. Description of the Prior Art
Generally, in civil engineering foundation works, construction of board piles (field-made piles) or insertion of P.C piles, H beam piles, steel piles or the like in various kinds of grounds is carried out with the aim of increasing the foundation ground bearing capacity.
In carrying out foundation works as above, when a stratum in which much water springs up, a boulder formation, a conglomerate formation and the like are bored with the conventional working method, a bored hole will collapse in many cases, raising a problem that the aforementioned pile or the like cannot be inserted to a bored depth. Even if a pile can be inserted to a depth of a bored hole, there arises another problem that in some cases, the pile will settle owing to insufficient ground bearing power.
In order to solve the above problems, during execution of field work, operation has hitherto been carried out in which a cylindrical iron pipe is inserted to a bored depth after boring by such a method as pile driving, clay in the cylindrical iron pipe is removed and cement paste is then grouted into the inside of the cylindrical iron pipe, and the cylindrical iron pipe is pulled up by means of a separate crane during curing of cement. Such operation, however, requires a complicated operation process including boring, insertion of the cylindrical iron pipe, cleaning of the inside of the cylindrical iron pipe, grouting of cement and pull-up of the cylindrical iron pipe, thus needing many different apparatus therefor, and because of complexiety of exchange of various apparatus, a great operation cost is needed.
SUMMARY OF THE INVENTION
An object of the invention is to provide a cement soil apparatus of underground borer capable of solving the above conventional various problems.
The present inventor has developed an improved apparatus for smoothly perfoming boring operation in the aforementioned operation and has already filed an application entitled "Underground Borer" (Japanese Utility Model Application No. Hei 3-109630). Essentially, the aforementioned object can be accomplished by laying a cement soil apparatus in the underground borer according to the anterior application.
Essentially, in a cement soil apparatus of underground borer according to the present invention, a screw shaft and a rotary machine for rotating it are disposed on a guide stilt of a vehicle body, a down hammer formed with a screw blade is connected to a lower end of the screw shaft, supply conduits for cement milk or the like are formed in the screw shaft and the down hammer, respectively, such that the supply conduits in the screw shaft are in communication with those in the down hammer, and valves openable by pressure are disposed in lower end portions of the supply conduits.
According to a preferred embodiment of the invention, in a cement soil apparatus of underground borer having a screw shaft and a rotary machine for rotating it which are disposed on a guide stilt of a vehicle body, and a down hammer formed with a screw blade and connected to a lower end of the screw shaft, a hexagonal projection formed at an upper end portion of the down hammer is fitted in a hexagonal hole formed in a lower end portion of the screw shaft and the hexagonal projection is fixedly coupled to the screw shaft by a pin, supply conduits for cement milk or the like are formed in the screw shaft and the down hammer, respectively, such that the supply conduits in the screw shaft are in communication with those in the down hammer, and valves openable by pressure are disposed in lower end portions of the supply conduits, whereby cement milk or the like can be supplied from the outside to the inside of a bored hole.
In a method of forming an underground hole by using the above apparatus, also disclosed in the present invention, boring operation by the down hammer is carried out, and after completion of the boring operation, the down hammer is pulled up while cement milk or the like being supplied to the wall surface of a bored hole to plaster the inner surface of the bored hole with cement milk or the like.
According to the cement soil apparatus of underground borer and the underground hole forming method of the invention, when the down hammer is pulled up after completion of boring operation, cement milk (this is not limitative and, for example, bentonite may be used) can be grouted to prevent collapse of an original form of the bored hole and keep it as it is and besides, the cement milk can be grouted into part of the original ground below the bored hole to increase strength of the ground. Accordingly, after insersion of a pile, frictional force at the periphery of the pile can also be increased to minimize settlement of the pile. At the same time, operation can be very simplified as compared to the conventional operation and therefore a benefical function of drastically reducing the cost of operation can be fulfilled.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view showing the overall construction of the invention.
FIG. 2 is an enlarged, longitudinal sectional view of a hammer extracted from A portion of FIG. 1.
FIG. 3 is a cross-sectional view taken on the line B--B of FIG. 2.
FIG. 4 is a cross-sectional view taken on the line C--C of FIG. 2.
FIG. 5 is a diagram showing an example of a state of cement grouting by the apparatus of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The invention will now be described by way of example with reference to the accompanying drawings.
A screw shaft 3 and a rotary machine 4 for rotating it are disposed along a guide stilt 2 standing upright in front of a vehicle body 1, and a down hammer 6 formed with a screw blade 5 is connected to a lower end of the screw shaft 3. In this arrangement, a hexagonal hole 7 is formed in a lower end portion of the screw shaft 3, a hexagonal projection 8 is formed at an upper end portion of the down hammer 6, the hexagonal projection 8 is fitted in the hexagonal hole 7, and the hexagonal projection 8 is fixedly coupled to the screw shaft by means of a pin 9.
Further, in the screw shaft 3, a pressurized air supply conduit 3' is bored in the center and cement milk supply conduits 10 and 10' are bored on both sides of the conduit 3' and in the down hammer 6, conduits 11 and 11' in communication with the supply conduits 10 and 10', respectively, are also bored so that cement milk may be dischaged through valves 12 and 12' disposed in lower end portions of the conduits. A channel extending from a cement mixer 13 connects to the cement milk supply conduits 10 and 10' through the rotary machine, and the valves 12 and 12' disposed at the lower end portion of the down hammer 6 are allowed to open only when supply pressure of the cement milk prevails in the conduits 11 and 11'.
In FIG. 1, reference numeral 14 designates a generator, 15 an air compressor and 16 a bored hole.
With the apparatus of the invention constructed as above, the hole 16 is bored by operating the down hammer 6. Slime generated during this operation can be removed readily by means of the screw blade 5 and screw shaft 3 and the hole 16 can be dug to a deeper depth in accordance with the same operation as that of the apparatus described in the aforementioned anterior application.
When the soil property surrounding the hole 16 bored through the above operation corresponds to a atratum in which water springs up, a boulder formation or a conglomerate formation and so the bore will collapse upon pull-up of the down hammer, the down hammer 6 is driven and the cement mixer 13 is operated to supply cement milk to the conduits 10 and 10' and 11 and 11'. The valves 12 and 12' are opened by supply pressure of the cement milk supplied and the cement milk is grouted in the inner columnar surface of the hole 16. At that time, the down hammer in rotation plasters the cement milk to form a cement column and wall and consequently an original form of the hole can be conserved as it is, thereby ensuring that the pile can be inserted readily, frictional force at the periphery of the inserted pile can also be increased by the cement milk inside the hole 16, the strenght of the stratum can also be increased and eventually settlement of the pile can be stopped.
The invention has been described by referring to the embodiment of the cement soil apparatus of underground borer for illustration purpose only, and other many modifications, changes and alternations may be within the framework of the invention. In at least the arrangement set forth so far, the number and size of the cement milk supply conduits can be increased or decreased in accordance with the size and form of a borer,
In accordance with the invention, pile driving operation can be simplified greatly as compared to that in the conventional working method and the cost of foundation work can be reduced drastically.

Claims (3)

What is claimed is:
1. A cement soil apparatus of underground borer wherein a screw shaft and a rotary machine for rotating it are disposed on a guide stilt of a vehicle body, a down hammer formed with a screw blade is connected to a lower end of said screw shaft, supply conduits for cement milk or the like are formed in said screw shaft and said down hammer, respectively, such that said supply conduits in said screw shaft are in communication with those in said down hammer, and valves openable by pressure are disposed in lower end portions of said supply conduits.
2. A cement soil apparatus of underground borer having a screw shaft and a rotary machine for rotating it which are disposed on a guide stilt of a vehicle body, and a down hammer formed with a screw blade and connected to a lower end of said screw shaft, wherein a hexagonal projection formed at an upper end portion of said down hammer is fitted in a hexagonal hole formed in a lower end portion of said screw shaft and said hexagonal projection is fixedly coupled to said screw shaft by a pin, supply conduits for cement or the like are formed in said screw shaft and said down hammer, respectively, such that said supply conduits in said screw shaft are in communication with those in said down hammer, and valves openable by pressure are disposed in lower end portions of said supply conduits, whereby cement milk or the like can be supplied from the outside to the inside of a bored hole.
3. A method of forming an underground hole by using an apparatus having a screw shaft and a rotary machine for rotating it which are disposed on a guide stilt of a vehicle body, a down hammer formed with a screw blade and connected to a lower end of said screw shaft, supply conduits for cement or the like formed in said screw shaft and said down hammer, respectively, such that said supply conduits in said screw shaft are in communication with those in said down hammer, and valves openable by pressure are disposed in lower end portions of said supply conduits, wherein boring operation by said down hammer is carried out, and after completion of said boring operation, said down hammer is pulled up while cement milk or the like being supplied to the wall surface of a bored hole through said supply conduits and said valve to plaster the inner surface of said bored hole with cement milk or the like.
US08/083,172 1992-12-10 1993-06-29 Cement soil apparatus of underground borer Expired - Fee Related US5423636A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1019920023838A KR940015148A (en) 1992-12-10 1992-12-10 Cement SOIL device of underground drilling machine
KR1992-23838 1992-12-10

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US5423636A true US5423636A (en) 1995-06-13

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JP (1) JPH0791930B2 (en)
KR (1) KR940015148A (en)
CN (1) CN1088283A (en)
AU (1) AU666017B2 (en)
TW (1) TW226038B (en)

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RU2135691C1 (en) * 1998-11-10 1999-08-27 Галай Борис Федорович Method for building of cast-in-place pile
US6257803B1 (en) * 1998-07-23 2001-07-10 Mccabe Howard Wendell Three component chemical grout injector
RU2205262C2 (en) * 2001-07-25 2003-05-27 Перцовский Михаил Израилевич Method of pile construction
US20040028480A1 (en) * 2001-08-03 2004-02-12 Verstraeten Alexander Julien Method for making a foundation pile
US20040182607A1 (en) * 2002-11-07 2004-09-23 Holte Ardis L. Method of forming concrete pilings using a reverse circulation drilling system
KR100497281B1 (en) * 2004-06-05 2005-07-01 장성두 Agitating device for ground improvement with reinforced excavation capability and soil improvement method using it
CN100376750C (en) * 2004-11-26 2008-03-26 王平 Construction method of high-performance cement soil pile
US20080131211A1 (en) * 2004-07-13 2008-06-05 Nesmith Willie M Installation effort deep foudnation method
RU2327007C1 (en) * 2006-11-30 2008-06-20 Иван Константинович Попсуенко Method of drill-injection stilt formation
WO2010090577A1 (en) * 2009-02-09 2010-08-12 Wassara Ab Arrangement for a down-the-hole hammer drill for use in soil consolidation through jet grouting
CN103061330A (en) * 2013-01-25 2013-04-24 张璐 X-shaped stirring drilling machine
CN103089145A (en) * 2013-02-06 2013-05-08 上海中联重科桩工机械有限公司 Down-the-hole hammer power head of rotary drilling rig and rotary drilling rig
CN105926626A (en) * 2016-05-04 2016-09-07 北京建材地质工程公司 Construction process for super-long vibration jet-grouting pile of pneumatic down-the-hole hammer, and equipment thereof
CN113585981A (en) * 2021-08-23 2021-11-02 中铁十五局集团第五工程有限公司 Drilling and cutting device and drilling method for cement soil bidirectional mixing pile
US11492774B2 (en) 2019-01-04 2022-11-08 Ojjo, Inc. Systems, methods and machines for driving screw anchors
US20250333921A1 (en) * 2021-04-29 2025-10-30 Mincon International Limited Hydraulic down-the-hole hammer and subsea pile

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CN100386484C (en) * 2005-07-07 2008-05-07 何世鸣 a concrete pile
US7555854B2 (en) 2006-11-30 2009-07-07 Mlt Soil Co., Ltd. Earth auger head and excavation method
CN101967826B (en) * 2010-10-14 2012-05-23 李式仁 Vibrating bar-inserting long spiral air-cooled drilling rock-socketed pile forming method and equipment
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CN103114806A (en) * 2013-02-06 2013-05-22 上海中联重科桩工机械有限公司 Rotary drilling rig
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CN108119067B (en) * 2018-01-29 2024-06-11 上海广大基础工程有限公司 Environment-friendly grouting drilling tool and retainer combined structure
CN114250767A (en) * 2022-02-09 2022-03-29 中建三局集团北京有限公司 Multi-shaft pressure grouting cement-soil pile construction process based on solid waste utilization
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DE2158764A1 (en) * 1970-11-30 1972-06-22 Nakanishi, Wataru, Tokio Method for producing an underground wall
US3800544A (en) * 1970-11-30 1974-04-02 W Nakanishi Method for forming an underground wall comprising a plurality of columns in the earth and soil formation
US3793844A (en) * 1971-04-07 1974-02-26 Bolt Associates Inc System for increasing the load-bearing capacity of soil
US4016944A (en) * 1976-01-12 1977-04-12 Reed Tool Company Pneumatic hammer-auger earth boring apparatus
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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6257803B1 (en) * 1998-07-23 2001-07-10 Mccabe Howard Wendell Three component chemical grout injector
RU2135691C1 (en) * 1998-11-10 1999-08-27 Галай Борис Федорович Method for building of cast-in-place pile
RU2205262C2 (en) * 2001-07-25 2003-05-27 Перцовский Михаил Израилевич Method of pile construction
US20040028480A1 (en) * 2001-08-03 2004-02-12 Verstraeten Alexander Julien Method for making a foundation pile
US7429148B2 (en) * 2001-08-03 2008-09-30 Funderingstechnieken Verstraeten B.V. Method for making a foundation pile
US20040182607A1 (en) * 2002-11-07 2004-09-23 Holte Ardis L. Method of forming concrete pilings using a reverse circulation drilling system
KR100497281B1 (en) * 2004-06-05 2005-07-01 장성두 Agitating device for ground improvement with reinforced excavation capability and soil improvement method using it
US20080131211A1 (en) * 2004-07-13 2008-06-05 Nesmith Willie M Installation effort deep foudnation method
CN100376750C (en) * 2004-11-26 2008-03-26 王平 Construction method of high-performance cement soil pile
RU2327007C1 (en) * 2006-11-30 2008-06-20 Иван Константинович Попсуенко Method of drill-injection stilt formation
WO2010090577A1 (en) * 2009-02-09 2010-08-12 Wassara Ab Arrangement for a down-the-hole hammer drill for use in soil consolidation through jet grouting
CN102301073A (en) * 2009-02-09 2011-12-28 瓦萨拉股份公司 Device for down-the-hole hammer drilling in soil consolidation by jet grouting
US8992130B2 (en) 2009-02-09 2015-03-31 Lkab Wassara Ab Arrangement for a down-the-hole hammer drill for use in soil consolidation through jet grouting
EP2393991A4 (en) * 2009-02-09 2017-04-19 Wassara AB Arrangement for a down-the-hole hammer drill for use in soil consolidation through jet grouting
CN103061330A (en) * 2013-01-25 2013-04-24 张璐 X-shaped stirring drilling machine
CN103061330B (en) * 2013-01-25 2016-03-16 卢兴耐 X-type agitation driller
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CN105926626A (en) * 2016-05-04 2016-09-07 北京建材地质工程公司 Construction process for super-long vibration jet-grouting pile of pneumatic down-the-hole hammer, and equipment thereof
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TW226038B (en) 1994-07-01
JPH06212870A (en) 1994-08-02
CN1088283A (en) 1994-06-22
AU4155993A (en) 1994-06-23
JPH0791930B2 (en) 1995-10-09
AU666017B2 (en) 1996-01-25
KR940015148A (en) 1994-07-20

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